Circle of close friends drifting away

Isit common when friends started their own family and communication between friends gets lesser and sometimes silence? I got a group chat with small group of close friends, which most of us are married, 2 has just gave birth, few are currently pregnant. I'm currently baking one too but in 1st trim so I havnt break the gd news to them yet. We used to be active in our chat, esp when one started with something, the chat can flood up to 100 msges within short period of time. But now, some read but only reply with few words and went silence, some read without reply, but I still see them active in social media. I felt we are drifting away.. Sometimes I have tried to create convo when I shared some news or funny stuff from online but not much response from them. I don't know am I getting sensitive and emotional in this or is this norm in this stage of life.